Your bread-and-butter of the game. On most weapons you can increase things such as damage done, fire rate, reload, clip capacity, accuracy, and even critical chance. That's a whole lot of stats for each and every weapon. No wonder there are so many trophies tied to this section!

On Casual and Survival picking and upgrading a favorite weapon is easy and beneficial to do. Even the handgun can be powerful. On Nightmare and above though, enemies take too much damage so it is recommended to only upgrade the critical chance on the Handgun and Shotgun in early chapters. Although is should be noted that a max-power magnum for the later chapters is nothing short of a god-send.

Also note that any upgrades you put on the Handgun and Sniper Rifle will carry over to the Burst Handgun and High-Powered Sniper Rifle once you get them for collecting all of the map pieces.

HANDGUN

• DAMAGE MULTIPLIER
  • Level 2 (120%): 2,500 Green Gel
  • Level 3 (140%): 6,000 Green Gel
  • Level 4 (160%): 12,000 Green Gel
  • Level 5 (200%): 20,000 Green Gel
• FIRE RATE
  • Level 2 (.80 seconds): 1,000 Green Gel
  • Level 3 (.65 seconds): 2,000 Green Gel
  • Level 4 (.50 seconds): 5,000 Green Gel
  • Level 5 (.30 seconds): 7,000 Green Gel
• RELOAD TIME
  • Level 2 (1.93 seconds): 500 Green Gel
  • Level 3 (1.58 seconds): 1,000 Green Gel
  • Level 4 (1.33 seconds): 4,000 Green Gel
  • Level 5 (1.16 seconds): 10,000 Green Gel
• CLIP CAPACITY
  • Level 2 (7 Bullets): 1,000 Green Gel
  • Level 3 (8 Bullets): 2,000 Green Gel
  • Level 4 (9 Bullets): 5,000 Green Gel
  • Level 5 (12 Bullets): 10,000 Green Gel
• 
  ACCURACY
  • Level 2 (4.5 degree sway): 500 Green Gel
  • Level 3 (4.0 degree sway): 1,500 Green Gel
  • Level 4 (3.5 degree sway): 2,500 Green Gel
  • Level 5 (2.5 degree sway): 5,000 Green Gel
• CRITICAL
  • Level 2 (+10% Chance): 1,500 Green Gel
  • Level 3 (+20% Chance): 3,000 Green Gel
  • Level 4 (+30% Chance): 9,000 Green Gel
  • Level 5 (+50% Chance): 20,000 Green Gel

MAGNUM

• DAMAGE MULTIPLIER
  • Level 2 (120%): 8,000 Green Gel
  • Level 3 (140%): 12,000 Green Gel
  • Level 4 (160%): 18,000 Green Gel
  • Level 5 (200%): 35,000 Green Gel
• FIRE RATE
  • Level 2 (.90 seconds): 2,000 Green Gel
  • Level 3 (.80 seconds): 4,000 Green Gel
  • Level 4 (.70 seconds): 6,000 Green Gel
  • Level 5 (.50 seconds): 14,000 Green Gel
• RELOAD TIME
  • Level 2 (1.93 seconds): 2,000 Green Gel
  • Level 3 (1.58 seconds): 3,000 Green Gel
  • Level 4 (1.33 seconds): 5,000 Green Gel
  • Level 5 (1.16 seconds): 10,000 Green Gel
• CLIP CAPACITY
  • Level 2 (7 Bullets): 2,000 Green Gel
  • Level 3 (8 Bullets): 6,000 Green Gel
  • Level 4 (9 Bullets): 12,000 Green Gel
  • Level 5 (12 Bullets): 20,000 Green Gel
• ACCURACY
  • Level 2 (4.5 degree sway): 1,500 Green Gel
    Level 3 (4.0 degree sway): 3,000 Green Gel
    Level 4 (3.5 degree sway): 9,000 Green Gel
    Level 5 (2.5 degree sway): 15,000 Green Gel

SHOTGUN

• DAMAGE MULTIPLIER
  • Level 2 (120%): 3,500 Green Gel
  • Level 3 (140%): 8,000 Green Gel
  • Level 4 (160%): 16,000 Green Gel
  • Level 5 (200%): 28,000 Green Gel
• FIRE RATE
  • Level 2 (1.50 seconds): 1,000 Green Gel
  • Level 3 (1.40 seconds): 2,000 Green Gel
  • Level 4 (1.30 seconds): 5,000 Green Gel
  • Level 5 (1.10 seconds): 7,000 Green Gel
• RELOAD TIME
  • Level 2 (2.30 seconds): 1,500 Green Gel
  • Level 3 (1.81 seconds): 3,000 Green Gel
  • Level 4 (1.58 seconds): 6,000 Green Gel
  • Level 5 (1.27 seconds): 10,000 Green Gel
• CLIP CAPACITY
  • Level 2 (5 Bullets): 2,000 Green Gel
  • Level 3 (6 Bullets): 4,000 Green Gel
  • Level 4 (8 Bullets): 7,000 Green Gel
  • Level 5 (10 Bullets): 12,000 Green Gel
• CRITICAL
  • Level 2 (+10% Chance): 1,500 Green Gel
  • Level 3 (+20% Chance): 4,000 Green Gel
  • Level 4 (+30% Chance): 10,000 Green Gel
  • Level 5 (+50% Chance): 18,000 Green Gel

SNIPER RIFLE

• DAMAGE MULTIPLIER
  • Level 2 (120%): 4,000 Green Gel
  • Level 3 (140%): 8,000 Green Gel
  • Level 4 (160%): 18,000 Green Gel
  • Level 5 (200%): 30,000 Green Gel
• FIRE RATE
  • Level 2 (1.30 seconds): 1,500 Green Gel
  • Level 3 (1.10 seconds): 3,000 Green Gel
  • Level 4 (1.00 seconds): 6,000 Green Gel
  • Level 5 (0.80 seconds): 10,000 Green Gel
• RELOAD TIME
  • Level 2 (3.41 seconds): 1,000 Green Gel
  • Level 3 (3.07 seconds): 2,000 Green Gel
  • Level 4 (2.56 seconds): 7,000 Green Gel
  • Level 5 (2.04 seconds): 12,000 Green Gel
• CLIP CAPACITY
  • Level 2 (6 Bullets): 1,500 Green Gel
  • Level 3 (7 Bullets): 3,000 Green Gel
  • Level 4 (8 Bullets): 9,000 Green Gel
  • Level 5 (10 Bullets): 20,000 Green Gel
• CRITICAL
  • Level 2 (+20% Chance): 1,000 Green Gel
    Level 3 (+40% Chance): 3,000 Green Gel
    Level 4 (+60% Chance): 5,000 Green Gel
    Level 5 (+100% Chance): 8,000 Green Gel

AGONY CROSSBOW

• CHARGE TIME
  • Level 2 (.67 seconds): 1,000 Green Gel
  • Level 3 (.33 seconds): 4,000 Green Gel
• RANGE
  • Level 2 (120%): 2,000 Green Gel
  • Level 3 (150%): 4,000 Green Gel
• RELOAD TIME
  • Level 2 (1.28 seconds): 2,000 Green Gel
  • Level 3 (1.11 seconds): 6,000 Green Gel